[INFO] cloning repository https://github.com/noormohammedb/rust-async-playbook
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/noormohammedb/rust-async-playbook" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoormohammedb%2Frust-async-playbook", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoormohammedb%2Frust-async-playbook'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3888555ee8ab3b10f5b6eaabeaa16cd3fc5d4b1
[INFO] checking noormohammedb/rust-async-playbook against master#cb06d12710575a0d7ff71d6fe108f3bcff4f9195 for pr-128425-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoormohammedb%2Frust-async-playbook" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/noormohammedb/rust-async-playbook on toolchain cb06d12710575a0d7ff71d6fe108f3bcff4f9195
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cb06d12710575a0d7ff71d6fe108f3bcff4f9195" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/noormohammedb/rust-async-playbook
[INFO] finished tweaking git repo https://github.com/noormohammedb/rust-async-playbook
[INFO] tweaked toml for git repo https://github.com/noormohammedb/rust-async-playbook written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/noormohammedb/rust-async-playbook already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cb06d12710575a0d7ff71d6fe108f3bcff4f9195" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+cb06d12710575a0d7ff71d6fe108f3bcff4f9195" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f37e0959f515ca761dda107388e9d340a18229ebb9cb32afb7b8679368bb266a
[INFO] running `Command { std: "docker" "start" "-a" "f37e0959f515ca761dda107388e9d340a18229ebb9cb32afb7b8679368bb266a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f37e0959f515ca761dda107388e9d340a18229ebb9cb32afb7b8679368bb266a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f37e0959f515ca761dda107388e9d340a18229ebb9cb32afb7b8679368bb266a", kill_on_drop: false }`
[INFO] [stdout] f37e0959f515ca761dda107388e9d340a18229ebb9cb32afb7b8679368bb266a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+cb06d12710575a0d7ff71d6fe108f3bcff4f9195" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c34aa70148c4a6265f1ada0e0dc0538bf3fdba53f6d380fcc05c90d7b4c322b2
[INFO] running `Command { std: "docker" "start" "-a" "c34aa70148c4a6265f1ada0e0dc0538bf3fdba53f6d380fcc05c90d7b4c322b2", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Checking simple_async v0.1.0 (/opt/rustwide/workdir/simple_async)
[INFO] [stdout] warning: unused import: `Pending`
[INFO] [stdout]  --> simple_async/src/main.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |   future::{Future, Pending},
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `bar` should have an upper camel case name
[INFO] [stdout]   --> simple_async/src/main.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct bar {
[INFO] [stdout]    |        ^^^ help: convert the identifier to upper camel case: `Bar`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Pending`
[INFO] [stdout]  --> simple_async/src/main.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |   future::{Future, Pending},
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `bar` should have an upper camel case name
[INFO] [stdout]   --> simple_async/src/main.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct bar {
[INFO] [stdout]    |        ^^^ help: convert the identifier to upper camel case: `Bar`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `koo`
[INFO] [stdout]  --> simple_async/src/main.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 |   let koo = foo1();
[INFO] [stdout]   |       ^^^ help: if this is intentional, prefix it with an underscore: `_koo`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `koo`
[INFO] [stdout]  --> simple_async/src/main.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 |   let koo = foo1();
[INFO] [stdout]   |       ^^^ help: if this is intentional, prefix it with an underscore: `_koo`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cx`
[INFO] [stdout]   --> simple_async/src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     cx: &mut std::task::Context<'_>,
[INFO] [stdout]    |     ^^ help: if this is intentional, prefix it with an underscore: `_cx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cx`
[INFO] [stdout]   --> simple_async/src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     cx: &mut std::task::Context<'_>,
[INFO] [stdout]    |     ^^ help: if this is intentional, prefix it with an underscore: `_cx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo2` is never used
[INFO] [stdout]   --> simple_async/src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn foo2() -> impl Future<Output = usize> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo2` is never used
[INFO] [stdout]   --> simple_async/src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn foo2() -> impl Future<Output = usize> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `d` is never read
[INFO] [stdout]   --> simple_async/src/main.rs:25:3
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct bar {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 25 |   d: usize,
[INFO] [stdout]    |   ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `d` is never read
[INFO] [stdout]   --> simple_async/src/main.rs:25:3
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct bar {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 25 |   d: usize,
[INFO] [stdout]    |   ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo3` is never used
[INFO] [stdout]   --> simple_async/src/main.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn foo3() -> impl Future<Output = usize> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo3` is never used
[INFO] [stdout]   --> simple_async/src/main.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn foo3() -> impl Future<Output = usize> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "c34aa70148c4a6265f1ada0e0dc0538bf3fdba53f6d380fcc05c90d7b4c322b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c34aa70148c4a6265f1ada0e0dc0538bf3fdba53f6d380fcc05c90d7b4c322b2", kill_on_drop: false }`
[INFO] [stdout] c34aa70148c4a6265f1ada0e0dc0538bf3fdba53f6d380fcc05c90d7b4c322b2